So you want to use renewable sources for your home power, but can't install solar panels & a wind turbine? About half of US retail power customers have the option of purchasing "green" power from their electrical utility companies (or, to be more precise, have the option of asking the utilities to buy a fraction more power from a renewable source to put into the grid at large -- electrons are electrons, and everyone on the grid draws from the same pool). If you aren't in that lucky half, there are other ways to boost the use of renewable power, from pricing premiums to "tradable renewable certificates." Treehugger has the breakdown and the links.